Ausable Club
Those punks in St. Huberts own part of Shanty Brook - and I know they take the "No Off Trail Hiking" rule very seriously. Be careful. They only own the lower part of it (up to about 2600'). The best access from state land would be to climb the Sawteeth trail from Upper Ausable Lake until state land is reached, then bushwhack due west until you hit Shanty Brook.
The only thing I know about this area is that the slides on the East/South Faces of both Basin, Saddleback, and Gothics are all quite steep and would require rock climbing racks and ropes. I don't know of anyone ever climbing Basin and Saddleback this way.
The Adirondack Rock Climbing guide states that Gothics's South Face has a climbing grade from about 5.4 to 5.7 - but that could vary widely in either direction. It also says that the best approach to climbing on Gothic's South Face is to bushwhack down from the Gothics/Pyramid Col and then climb back up. Page 391 has a great picture of the South Face.
Another feature of interest is the amphitheater wall on the south Side of Basin Mountain. It sits on the ridge between Shanty and Haystack Brooks. As fas as I know - noone has ever climbed or explored this unique area. You can find a picture of it on page 382 of the ADK Climbing Guide.
peace,
Oysterhead